Improvement in riveting-machines



PATENT fFFIcLrJo WILLIAM SELLERS, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN RlVETING-MACHINES.

Specification forming part of Letters Patent N0. 136,100, dated February 1B, 1873.

To all whom it may concern:

Be it known that I, WILLIAM SELLERS, of

the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Machines `for Riveting Plate or Boiler Iron,pof which tthe following is a specification, reference be- Y ing had to the accompanying drawing, in which-J- Figure 1 is a plan of -a steam riveting-mat chine embodying my said improvements; Fig. 2, a side elevation and section through' the center of the cylinder and valve-chest; Fig. 3, an end view of the cylinder and valvechest. Y i

My present improvements relate to the` steam riveting-machine for which Letters Patent of the United States were granted to me February 7, 1871, and in which "the cylinder D and guide E are connected together so as to form a bearing of great length itor the piston-rod G, and in which thecylinder D-is supported by means of the con( neotion ofthe guide E to the post A, so that in driving up the piston the pressure in the cylinder is transferred in a direct line to the post. The rivetpunch g is secured in the forthrough its entire length, and hat on its upperv surface, so as to reduce to the narrowest limits consistent with requisite stiffness the distance from the center of the punch to the upper side of the piston-rod, to meet the requirements, forexample, of such Work as the riveting of the dre-box to' thecylindrical `shell of aflocomotive-boiler; in which caso, the first line of rivets being but two inches from the at side of the hre-box, the unobstructed turning :space for the fiat side of the fire-box, be`

low the Shell of the boiler, must come within a plane not exceeding two inches above the center of the punch.

The trough or guide E, corresponding in form to the semi-cylindrical shape'fbf the piston-'rod G, I have heretofore covered in by a iiat plate, Hfsecured on the trough by means of screws, and having a flange* at the end by which it is secured to the cover of the cylinder D. t

Although the pistourod G is required to play freely within this trough, its great length has been found suiicient to prevent the escape of steam through the trough under any ordinary pressure, the water of condensation following the piston being carried olf through suitable ducts or channels c c in the sides and bottom of the guide E', and thus pre vented from reaching the Work where otherwise it would create steam or vapor, and preA vent the operator from managing his work y efficiently.

Now, it is the object of my present invenL tion to secure still greater perfection in the work-ing' of this part of my machine, and to provide more ei'ectually against al1 leakage Vof steam through the joints between the flat smaller cylinder, N, and a large piston, F,

connected with a smaller piston, O.

This cylindrical part O of the piston-rod I provide with suitable steamtight packing, using, by preference, two orvmore steel packing-rings, u u, having asquaresection, ttin g easily within corresponding'spaces in the piston-rod, the rings being of such diameter that, when cut apart and compressed within the cylindrical guide N, they will exert upon it sufficient pressure to prevent the escape of steam. l

Bythis means I further combine with my other improvements in the riveting-machine al1 the advantages of a stning-box without 2. The combination of the piston O and cylcntting oft' the connection between the cy1in index.' N with thel piston F and cylinder) 1 );l f, der and the guides, and without using inde- 3. The combination of the packedv piston F pendent supports for each. Withrthe packed piston-rod G and trough E.

WhatI claim herein7 and desire to secure by WM. SELLERS.

Letters Patent, is-. Witnesses: Y

l. The combination of the cylinder N with WM. E. MORGAN, the cylinder D and trough or guide E. WM. S. LYNN. 

